Music discovery service Spotify got a big upgrade today with the inclusion of apps that enhance the desktop program. The new Spotify apps platform is also opened up for third party developers to use for their own sites and apps.

At the big press conference, the Spotify folks demonstrated the service integrated into a Rolling Stone app, so you could read Rolling Stone-curated playlists and do things like read music reviews while listening to the songs at the same time.

Spotify's new apps will be arriving in an "App Finder" the sidebar (they're not there yet but you can expect them soon). Two interesting ones introduced are TuneWiki, so you can read lyrics as the song is playing, and SongKick, to access and play music from previous concert set lists.